The Correlations of the Six-minute Walk Test and Respiratory Functions in Chronic Obstructive Pulmonary Disease Patients with Chronic Hypercapnia

Chen, Shiau-Yee; Wu, Ying; Lin, Jiu-Jenq; Lee, Chun-Nin; Huang, Cho Yi; Chiang, Ling Ling

doi:10.1016/j.jecm.2011.11.008

Cited by 3 publications

(4 citation statements)

References 28 publications

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“…Two studies reported a significant 6MWD correlation with ⌬Borg similar to the present findings. 36,48 The correlation of pre-6MWT Borg-scale values and 6MWD was not significant in the present study, but Wijkstra et al 9 reported a significant correlation in a previous study. 6MWD correlation with post-6MWT Borg-scale values was significant in the present study similar to the findings of Freitas et al, 33 but Camargo et al 32 did not find a significant correlation.…”

Section: Discussioncontrasting

confidence: 67%

“…In agreement with these findings, 3 similar studies reported correlations between 6MWD and heart rate that were either weak or not statistically significant. 32,34,48 However, in male COPD subjects without cardiovascular disease or arrhythmias, another study reported a significant correlation between 6MWD and ⌬heart rate (r ϭ 0.51, P ϭ .005). 36 Similarly, the correlations of Borg-scale values with 6MWD in the present study are similar to those reported in previous studies, although there are some inconsistencies in current literature.…”

Section: Discussionmentioning

confidence: 99%

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Relation of Exercise Capacity With Lung Volumes Before and After 6-Minute Walk Test in Subjects With COPD

et al. 2014

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INTRODUCTION:There is growing evidence that exercise-induced variation in lung volumes is an important source of ventilatory limitation and is linked to exercise intolerance in COPD. The aim of this study was to compare the correlations of walk distance and lung volumes measured before and after a 6-min walk test (6MWT) in subjects with COPD. METHODS: Forty-five subjects with stable COPD (mean pre-bronchodilator FEV 1 : 47 ؎ 18% predicted) underwent a 6MWT. Body plethysmography was performed immediately pre-and post-6MWT. RESULTS: Correlations were generally stronger between 6-min walk distance and post-6MWT lung volumes than between 6-min walk distance and pre-6MWT lung volumes, except for FEV 1 . These differences in Pearson correlation coefficients were significant for residual volume expressed as percent of total lung capacity (؊0.67 vs ؊0.58, P ‫؍‬ .043), percent of predicted residual volume expressed as percent of total lung capacity (؊0.68 vs ؊0.59, P ‫؍‬ .026), inspiratory vital capacity (0.65 vs 0.54, P ‫؍‬ .019), percent of predicted inspiratory vital capacity (0.49 vs 0.38, P ‫؍‬ .037), and percent of predicted functional residual capacity (؊0.62 vs ؊0.47, P ‫؍‬ .023). CONCLUSIONS: In subjects with stable COPD, lung volumes measured immediately after 6MWT are more closely related to exercise limitation than baseline lung volumes measured before 6MWT, except for FEV 1 . Therefore, pulmonary function testing immediately after exercise should be included in future studies on COPD for the assessment of exercise-induced ventilatory constraints to physical performance that cannot be adequately assessed from baseline pulmonary function testing at rest.

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Section: Discussioncontrasting

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Relation of Exercise Capacity With Lung Volumes Before and After 6-Minute Walk Test in Subjects With COPD

et al. 2014

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“…Also patients with less walking distance had greater restrictive constraints. Minimum and mean spO 2 also showed correlations with FEV1, which suggested that patients with greater restrictive constraints had less min and mean spO2.these results, had consistency with Chen in Taiwan among patients with chronic obstructive pulmonary disease (COPD) [12].…”

Section: Discussionsupporting

confidence: 59%

Pulmonary physiotherapy effect on patients undergoing open cardiac surgery

Shakuri¹,

Salekzamani²,

Taghizadieh³

et al. 2014

RusOMJ

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Backgrounds and Objectives -Respiratory complications after open heart surgeries are common problems which can lead to death if not properly managed. The aim of this study was to evaluate the role of pulmonary rehabilitation before and after surgery for reducing the risk of pulmonary complications after surgery also correlations of the six-minute walk test and respiratory following open heart surgery. Material and Methods -In a randomized clinical trial, 60 patients undergoing heart surgery were divided into two groups randomly (groups A and B). In group A it was performed physiotherapy before and after chest physiotherapy surgery, but on patients in group B were done only chest physiotherapy after surgery. Effects of preoperative pulmonary rehabilitation were compared between two groups, using spirometry and six-minute walk test. Results -Thirty nine of males (65%) and 21 females (35%) with a mean age of 8.10±9.56 was been analyzed. The mean difference in predicted forced vital capacity (CI95%: 1.3 to 8.7) and predicted peak flow indices (CI95%: 1.9 to 9.4) of spirometery indicator was significant, also evaluation of six-minute walk test showed, mean difference in walking distant (CI95%: 8.8 to 21.0) and mean oxyhemoglobin saturation (CI95%: 0.59 to 1.67) in group A was more than group B. Inverse correlation of heart rate with forced vital capacity showed that patients with more restriction had more heart rate during the walking test. Conclusion -Pulmonary rehabilitation program before surgery is recommended to reduce complications of heart surgery. Further evaluations are necessary in relation to the sensitivity and specificity of six-minute walk test parameters alone in the evaluation of respiratory performance.

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“…Several authors have reported a relationship between 6MWD and modified Borg dyspnoea score in people with COPD [142][143][144][145], with correlation coefficients ranging from 0.39 to 0.49. Two studies showed that modified Borg score was an independent predictor of 6MWD [143,145].…”

Section: Dyspnoeamentioning

confidence: 99%

An official systematic review of the European Respiratory Society/American Thoracic Society: measurement properties of field walking tests in chronic respiratory disease

Singh¹,

Puhan²,

et al. 2014

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This systematic review examined the measurement properties of the 6-min walk test (6MWT), incremental shuttle walk test (ISWT) and endurance shuttle walk test (ESWT) in adults with chronic respiratory disease.Studies that report the evaluation or use of the 6MWT, ISWT or ESWT were included. We searched electronic databases for studies published between January 2000 and September 2013.The 6-min walking distance (6MWD) is a reliable measure (intra-class correlation coefficients ranged from 0.82 to 0.99 in seven studies). There is a learning effect, with greater distance walked on the second test (pooled mean improvement of 26 m in 13 studies). Reliability was similar for ISWT and ESWT, with a learning effect also evident for ISWT (pooled mean improvement of 20 m in six studies). The 6MWD correlates more strongly with peak work capacity (r50.59-0.93) and physical activity (r50.40-0.85) than with respiratory function (r50.10-0.59). Methodological factors affecting 6MWD include track length, encouragement, supplemental oxygen and walking aids. Supplemental oxygen also affects ISWT and ESWT performance. Responsiveness was moderate to high for all tests, with greater responsiveness to interventions that included exercise training.The findings of this review demonstrate that the 6MWT, ISWT and ESWT are robust tests of functional exercise capacity in adults with chronic respiratory disease. OverviewThe aim of this systematic review was to examine the measurement properties for the 6-min walk test (6MWT), incremental shuttle walk test (ISWT) and endurance shuttle walk test (ESWT) in adults with chronic respiratory disease. A companion paper describes the standard operating procedures for the tests [1]. The key findings of this systematic review are as follows.1) The 6-min walking distance (6MWD) is a valid and reliable measure of exercise capacity for people with chronic lung disease. The 6MWD correlates more strongly with measures of peak work capacity and physical activity than with respiratory function or quality of life, which supports its conceptualisation as a test of functional exercise performance.2) The ISWT offers a different protocol to the 6MWT as it is incremental and externally paced. The ISWT is a valid and reliable measure of cardiopulmonary exercise capacity in chronic obstructive pulmonary disease (COPD), where there is a strong relationship between ISWT distance and peak oxygen uptake (V9O 2 peak) or work rate on a cardiopulmonary exercise test (CPET).3) A learning effect is observed for the 6MWT and the ISWT. The second test usually is the better compared with the first, but this is inconsistent.4) The ESWT is a test of endurance capacity. It is externally paced and is performed along the same course as the ISWT. Two tests do not appear to be necessary if the second test is conducted on the same day.5) Reference equations have been proposed for the 6MWD and the ISWT. Age, height and weight are included in most equations. The influence of race and ethnicity is unclear.6) The safety profile of ...

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The Correlations of the Six-minute Walk Test and Respiratory Functions in Chronic Obstructive Pulmonary Disease Patients with Chronic Hypercapnia

Cited by 3 publications

References 28 publications

Relation of Exercise Capacity With Lung Volumes Before and After 6-Minute Walk Test in Subjects With COPD

Relation of Exercise Capacity With Lung Volumes Before and After 6-Minute Walk Test in Subjects With COPD

Pulmonary physiotherapy effect on patients undergoing open cardiac surgery

An official systematic review of the European Respiratory Society/American Thoracic Society: measurement properties of field walking tests in chronic respiratory disease

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